Improvement in machine for forming sheet-metal moldings



2 sheets-sheet 1.

l H.` G. FISKE. Machine for Making Sheet Iron Moldings. No. 106,803. l Patented Aug. 30, 1870.

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H. G. FiSKE.

Machine for Making Sheet Iron Moldings.

Patented Aug'. 30, i870.

W'tesses: i

@than @time IIRNRY C. rIsKnor sAN FRANCISCO, CALIFORNIA,

Letters Patent llo. 106,803, dated August 30, 1870.-

' ,IMPROVEMENT IN MecenateI ron FORMING SHEET-METAL lvronnnvca-s.l

The Schedule ,referred to in these Letters Patent and making `part of the same To all whom it may concern Be it known that I, HENRY G. Frsnn, of the city and county of San Francisco, State of California, have invented an Improved Machine for Forming Sheetiron Moldings and I do hereby dec-lare that the following is a full, clear, and exact description of the saine, reference being had to the accompanying drawings and to the letters marked thereon. y

My invention relates to a device for holding and bending sheet-iron, and forming it into moldings for architectural purposes, by which the operation is greatly facilitated, and consists of certain details of construction hereinafter set forth,

In the drawing- Figure 1, sheet l, is a front elevation of my invention.

Figure 2, sheet 1, a plan of same.

Figure 1, sheet 2, is a transverse vertical section of' the same, with certain parts removed.

Figures 2, 3, 4, 5, and 6, sheet 2, are details.

Figures 7 and 8, a device not actually forming a part of the machine, but having relation to it, as hereinafter described.

Like letters refer to like parts.

To enable others skilled in 'the art or science to which it most nearly appertains to make and use my invention, I will proceed to fully describe its construction and operation.

c represents a frame, consisting of certain` sills, posts, and braces, as shown. A

l) is a rectangular iron bar, resting in mortises in the inner posts.

c, a strong rectangular bar resting upon the bar b, and extending through mort-isos in all the posts, perforated at each end, and provided with open links or double hooks, d d, to which the weights c e and the levers ff are attached.

g is a purchase-frame, hinged-to the inner posts' in front of the bars'b and c. l

The levers f f pass through and are guided by mort-isos 71., in the inner posts, and have their ful' crnm on the top of the outer posts, as shown.

The operation is as follows:

The operator, being in front of the machine, first` grasps the long arm of the lever f in his hand, and, bringing it down, causes the weight e to rise, and

- with it the corresponding end of the barc, and, consequently, causes the weight e to descend, and with it the other end of the bar c, and, the bar being thus caused to roll or tilt over the rounded end of the bar b, an open space is thus formed between the'two bars, widest at that end. of the bar b nearest the weight e, and terminating in' nothing at ythe point of Contact of the two bars. luto this space the operator proceeds to insert the sheet of iron, that has been previously marked on the upper side, to show the line upon which it is to be bent, by first resting thesheet on the lower bar, then moving it along toward the point of contact of the two bars, until the left-hand edge of the sheet becomes pinched at the propel' point. and then swinging the sheet horizont-ally around that point, as a center, until the whole line coincides with the forward edge or face of the bar, and-then, by releasing the lever f, the bar c will resume a horizontal position, resting entirely upon the sheet of iron, and thus, with the bar b, forming a clamp that securely holds the sheet for the operation of bending, which can be readily performed by hand if theiron is light. But, if the material is thick and strong, the aid of the purchase-frame y becomes necessary, and whichI if forced downward from the position shown in the drawing, will, in its revolution, carry the projecting part of the sheet with it, causing it to bend in the required man ner, after which, by again bringing down' the lever f,V

the sheet will bc released, and the operation can he repeated. Y

It will he seen that, in the operation already described, the clamping force is equal to the combined weight of the' bar c and the two weights e e'; but only that part of the weight c that is unbalanced by the weight c' requires power to raise it bythe lever f. Also, that the saine operation could be performed with the same facility and result if the lever f was removed, and a pin, t, to prevent end motion,- inserted',

in the hole t', fitting loosely, in a hole provided for that purpose, in the bar c; or an effective clamp is also secured by inserting a closely-fitting pin, t', in the same holev i', and removing the weight c' altogether; but in that case the entire gravity of the weight c must be overcome by the operator through the lever f, and in that'case, also, the upper surface of the har b, 'or any bar replacing it, ot' any other'form, must have its upper surface always at the same height, or adjustable to that height by pieces 'provided for that purpose, placed under the ends of those bars. But the complete machine, as shown in sheet 1, adjusts itself to any inequality in the depth or height of the bar used.

A large number of cylindrical or other shaped formers or bars, b', of different sizes and diameters, may bcy usedl for this purpose, to enable the operator to produce the different curves required in moldings.v

Figs. 4, 5, and 6, sheet 2, show the manner of forming the ends to tit the mortises in the posts, but, on account of the shoulders produced on each end of those cylindrical bars, they are made shorter than the bar b, and are passed into positiolrthroughpassages j cut in. the posts for that purpose. One of these passages is shown in fig. 1, sheet 2. In order to change and insert these bars, both the levers ff' are get it out of the way, and, consequently, it is essential that it shall be so constructed thatit can be removed or lreplaced with facility.

Figs,'2 and '3, sheet 2, are sectional views of the ytwo inner posts and purchase-frame, from an enam-l ination of which it will be evident that, by means of the journal or end K, and the hollow wrist l, and the pin m,.this operation can'be very easily effected.

lwo views are also given, figs. 7 and 8, in which it is shown how the operation can be eiectedwhcn both journals ofthe purchase-dame are formed likeY the journal K in iig. 2. l

By this 'construction it is evident that the axis about which the purchase-frame turns may be made to' coincide with the axis of the bar b', it' required, but as it is not necessary that it should,y itis, for various manifest reasons, more convenient to locate that axis at or near the position sl own in the drawing.

In the use ot' vthis maihine, great economy of labor 'and seal.

and time is had, and a consequent reduction in the price of the moldings produced.

Having thus described my invention,

What I claim, and desire to secure by Letters Patent, is-

l. The bar c, in combination with the bars b b', the weights e, lever f, and pin c', with or without the purchasefframe g,substantially as and for the purpose described.

2. The bar c, in combination with the bars b b', the weights e e', and the lever f, with or without the pin i, and with or without the purchase-frame g, substantially as and for the purpose set forth.

3. The'framo a, the bar c, with the bars b b', the weights e e', the levers ff', the open linksd, with or without the pin i, and with or without the purchaseframe g, the whole constructed and arranged to operate substantially as described.

In testimony whereof- I have hereunto set myhand HENRY G. FISKE. [L 8.] y

Witnesses G. W. M. SMITH, H. S. TIBBEY. 

